Home / 20,999.75-31,500.24-5,417.38

Finding the Fourth Proportional to 20,999.75, 31,500.24 and 5,417.38

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Solution

The fourth proportional to 20,999.75, 31,500.24 and 5,417.38 is: 8,126.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.75 : 31,500.24 = 5,417.38 : x
  2. Step 2: Convert to fraction form
    20,999.75/31,500.24 = 5,417.38/x
  3. Step 3: Cross multiply
    20,999.75x = 31,500.24 × 5,417.38
  4. Step 4: Simplify right side
    20,999.75x = 170,648,585.58
  5. Step 5: Solve for x
    x = 170,648,585.58/20,999.75
  6. Step 6: Final answer
    x = 8,126.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.